61156559564 has 24 divisors (see below), whose sum is σ = 113170920576. Its totient is φ = 28870128000.

The previous prime is 61156559539. The next prime is 61156559621. The reversal of 61156559564 is 46595565116.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6009527 + ... + 6019694.

It is an arithmetic number, because the mean of its divisors is an integer number (4715455024).

Almost surely, 2^61156559564 is an apocalyptic number.

It is an amenable number.

61156559564 is a deficient number, since it is larger than the sum of its proper divisors (52014361012).

61156559564 is a wasteful number, since it uses less digits than its factorization.

61156559564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12029297 (or 12029295 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 53.

The spelling of 61156559564 in words is "sixty-one billion, one hundred fifty-six million, five hundred fifty-nine thousand, five hundred sixty-four".